Yeah. I am thinking a "redecorated" Mr Tea. Add the water and the "grist", push the button and it brews. Siphon the brew to a Mr Beer, add the yeast packet (a packet of sugar in the raw), and serve it straight from the bright tank (Mr Beer fermenter).

I'm thinking 2 Gallon cooler with braid, add water and drink mix, recirculate with pond pump for a few seconds for fun, add rice hulls. Let sit 1-2 minutes, then drain into 1G growler. Let sit overnight in fridge or I could buy a carbonator cap and we could drain it into an empty 2-Liter and carbonate. Maybe use food coloring to make it brown/black like Daddy's Beer.

Why not have him make cider. He would need to "mash" the apples and if you got a Soda Stream he could even carbonate it.

That's a good idea. My 3 yr old calls apple juice his beer. Instead of the soda stream maybe get a tap-a-draft. My old one worked with 3 liter soda bottles. Can pick up a cheap store brand soda, dump the soda (or drink it), wash the bottle, fill with cider and he can have his "beer" on tap.